Below is configuration, readed by X-CTU, XBEE v.1 with firmware 106.
Function set is XBEE 802.15.4

If i remember correct this device is not reprogrammed by me, i hope this is factory settings.

XB24_15_4_106.mxi
FE
0
W1
106
0
[A]CH=C
[A]ID=3332
[A]DH=0
[A]DL=0
[A]MY=0
[A]RN=0
[A]SM=0
[A]ST=1388
[A]SP=64
[A]BD=3
[A]RO=3
[A]D7=1
[A]D5=1
[A]P0=1
[A]PL=4
[A]RP=28
[A]CT=64
[A]GT=3E8
[A]CC=2B

 

Here any detail is important , and You really need to read a lot.
But at first time - try to set both devices into "factory" state.
Next change only DL and MY - give DL_1=1001 MY_1=1002, DL_2=1002 ,MY_2=1001;
At this moment forget about coordinator - if i remember correct in this setup coordinator is important if You build net of 3+ devices,or sleep modes will be used.Now You want to replace serial cable - with 2 devices. Dont think about power consumtion at this stage, about coordinator and end devices. These will comae later.
Hope this helps.